Saw-gin.



J. G. DICKSON.

SAW GIN.

APPLIGATION FILED JULY22,.1910.

Patented 1160.5, 1911.

UNTTED STATES PATENT oEErcE.

JAMES Gr. DICKSON, F LITTLE ROCK, ARKANSAS, ASSIGNOR TO DIXN MANUFACTURING i COMPANY, OF GREENWOOD, MISSISSIPPI, A CORPORATION OF'WEST VIRGINIA.

' SAW-GIN.

Specification of Letters Patent.

Application filed July 22, 1910. Serial No. 573,336.

.Little Rock, 'county .of Pulaski, State of Arkansas, have invented certain new and useful Improvements 1n Saw-Guns; and I 'i flo-herebydeclare the following to be a full,

clear, and exact description of the invention,

such aswill enable others skilled in the art to which it appertains to make and use the same.

This invent-ionrelates to saw gins, and 'it aims to provide certain improvements in the construction shown in my application,

Serial Number 500,843, led June '8, 1909. In that application I have describeds eEective means for removing the trash, such as lnotes, leavesand the like, from the lint on the revolving saw teeth and carrying such trash out of the machine by means'of an air blast. h p v According to the presentinvention, the trash is not only removed from the machiney by means of the air blast, but the latter is also used to remove the cleaned lint from the saws, the air for both of these purposes being taken from the same source.'

The novel features of the invention will appear clearly from the following descriptery of the usualcircular saws, in connection with which the ordinary ginv ribs B,. one

of whichl is partially shown, are employed.

r-These ribs maybe arranged in any appropriate way, without affecting the gist of the invention, but they are preferably applied to an upper vcross beam C, asfshown.

. The mechanism constructed in accordance with the present invention, and adapted to remove the trash from lthe'lintI on the saw teeth as well as to carry off the cleaned lintfrom t-he saws, is arranged atthe rear of the battery of saws A. It comprises a comparatively large air flue D into which air is 'completely' across the gin, as will be understood, that., is to say it is substantiallycoextensive vin length with the gang or battrash flue comprises tery of saws A, to lwhich it has a substantially parallel relation Leading laterally from the lower part of the air Hue D is an .extension F byme'ans of which the air inv the flue is directed laterally, in the direction of the saws, between upper and lower boards or plates G, H, as shown. In the embodiment illustrated, the board G which is uppermost, is substantially or approximately horizontal, while the lowerl board H has an upward inclination with respect to the saws. At the rear of the latter', that is, behind the ribs B and labove the lateral extension F, is a trash chamber I conforming generally to the peripheries of the saws and into which the trash vis thrown by centrifugal force after passing through the ribs 'on the lint carried by the saw teeth. The upper wall of the trash chamber I is formed by a curved plate z', while the lower part ofthis chamber is constituted by laterally adjustable plates 77,' 2. Between the lower edge 'of the curved upper plate l'and the lower edge of the plate c", a slot or aperture s is created, and this slot 'or aperture commu-l withthe air iiue extension F. above the same,

and debouches into a trash iue K extending across the gin in the space between the upper portion of the air Hue LD and the trash Patented Dec. 5, 1911,.

chamber I. A portion of the airu forced' through the `extension F of the air flue passes through a reversely directed air duct' or nozzle f which is so formed as to turn back the air entering the mouth of said duct from the extension F, and direct it into the trash duct J, substantially at the junction of the latter with the trash cham# is of reduced cross section at its point of discharge in order to obtain a strong draft in the trash duct. The duct f discharges `into the trash duct immediately below the vplate 5I', inthe embodiment shown, and said plate is adjustable laterally, by means of a slotted connection @embodying a plurality'of screws i4, to control the width ofthe slot 110 or aperture 3. The plate or Whipping board 2 extends into proximity to the saw teeth, and it can also be adjusted, relatively to said teeth, by the screws i just mentioned, which pass through both of the plates in question. Another portion of the air in the air Hue extension F is discharged into the intermediate portion of the trash duct J by means of a short duct 7' in the intermediate part of the board G, and in this way the draft in the aforesaid trash duct is considerably augmented. After the trash passes longi- `tudinally through t-he trash Hue K, it is discharged at one end thereof (toward the observer, as shown), being thus removed from the machine; Of course there is a strong draft through the Hue K to effect this result, and a whirling movement is given to the longitudinally moving air by thedirection of the inlet of the trash duct into said Hue in a substantially tangential direction, as shown. A small branch pipe d may also dischargetangentially into the Hue K from the main Hue D in order to increase this whirling effect, and at the same time to prevent the lodging of trash in the Hue K and facilitatethe discharge of such trash from the opposite end of the Hue.

As has been previously intimated, I not only aim to remove thevtrash from the lint on the saw teeth and from the machine but also to remove the lint itself, after being cleaned, from the saw teeth. In order to effect this result, the extension or air duct F is provided at its lower portion with a` small duct f", discharging adjacent thebattery of saws, as shown. This discharge duct, which is below the trash removing mechanism and at the extremity of the air Hue eX- tension'F, is preferably formed betweenan edge of the board H and an adjustable plate f5', similar to the plates previously described.

` This plate fy, has a downturned edge which deHects the discharging air in a downward direction against the saw teeth, so that it is eventually discharged .in line with the axesof the teeth when the latter reach the lower part of their rotary movement, as will be understood. The ducts or nozzles f, fx are preferably formed by the provision of a dividing block G interposed between the dust chute and the condenser chute and formingin connection therewith air blast passages respectively leading mouths of the chutes, the nozzle to direct a blast of air into the dust chute being directed into the latter between the lower wall thereof and the whipping board.

In the operation of the machine, the saws are rotated in the direction of thearrow, and the centrifugal force induced will throw the trash on the lint passing through the ribs B over against the upper or outer plate of the trash chamber I. The plates Z and 2v are adjusted to suit existing conditions, and

into the Y thetrash falling out of the bottom aperture or slot'z'3 of the trash chamber will pass directly into the lateral air blast in the dust chute J. The action of the air in the discharge duct f and in the trash Hue K will be readily understood from the foregoing4 description. Of course the lint which is cleaned passes on with the saw teeth and finally into the path of the blast issuin from the duct f", whereby all of the cleane lint is blown from the saws into a condenser chute M below the board H and from said condenser chute out of the machine, this operation being assisted by discharging air Afrom the Hue D through a port 71. into the space below the board H, in the direction indicated by the arrows. The plate or whipping board 2 may be used to exert a positive stripping action on the trash or may not, and it will be understood, of course, that trash falling on the plates z, 2 will slide downward, by gravity, to the discharge aperture 3 communicating with the trash duct in which the blast of air is maintained.

Without limiting myself to the constructionshown, I claim l. In a saw gin, the/combination with the saws, of means to direct a blast of air in proximity to but out of contact with the peripheries of the saws in order to remove the trash thrown off from the Saws, and means to direct a blast of air against the lint on the saw teeth from which the trash has been removed.

2. In a saw gin, the combination with the saws, of means to direct a blast of air toward the saws, means to direct a portion of such air in proximity to but out of contact with the saws to remove the trash thrown ofi'l from the saw teeth, and other means to direct a portion of the first mentioned air against the saw teeth to remove the cleaned lint therefrom.

3. In a saw gin, the combination with the saws, of an air Hue having a duct leading into proximity to the saws, means to direct a portion of the air in said duct in proximity to but out of contact with the saws in order to carry oH the trash thrown 0H' from the saw teeth, and means to direct another portion of the air in said duct directly v against the saw teeth, to remove the cleaned lint therefrom.

4. In a saw gin, the combination with the saws, of means to direct a blast of air awa;7 from and out of contact with the peripheries of the saws, to remove the trash thrown 0H' from the saws by centrifugal force, and means to direct a blast of air from the same source against the lower portions of the saws beyond the point where the trash is removed from the same.

5. In a saw gin, the combination with the saws, of a trash chamber adjacent the same, and having a discharge aperture or slot at its lower portion, an adjustable plateto control said aperture, av trash iue, and a trash duct connecting the aperture of thev trash chamber with said trash flue and into which a blast of air is discharged.

, 6. In a saw gin, the combination with the saws, of a trash duct into whichthe trash is thrown from said saws, means to direct a blast of air' through said duct, a trash iue move'the liberated lint from the machine. A 8. In a cotton gin, -a gin saw, a dust chute and a condenser chute, eachleadingr from a point adjacent to ,the saw, and a dividing- 'block interposed between. the two chutes and forming in connection therewith air blast passages respectively leading into the mouths of the chutes, with the air blast passage leading into the dust chute directed to expel the dust, etc., thrown off at the upperA portion of the saw without impmging on the latter, and the air passage leading into the condenser chute directed to remove `the cotton adhering to the saw teeth.

9. In a cotton gin, av gin saw, a--dust chute leading from a point adjacent to the 'saw a condenser chute lea in from la point adjacent to the saw and be ow the dust chute,

an air supply duct lleadin into the ginbetween said'\chute`s, and a ividing-block -ar'- 'ranged' between the chutes adjacent to the saw and forming in connection with the chutes, air .blast passages directed therein,

the air blast passage dlrected into the dust chute arranged out ofthe path of the saw.

prevent the accumulation of the trash 10; In a cotton gin, agin saw, a dust chamber adjoinin the upper ortion of the saw, a chute lea ing from t e lower por tion of the chamber, a whipping-board cooperative with the saw, and a nozzle to direct a blastof air into the chute, directed th' whipping-board.

11. In a cotton gin, a gin saw, a dust '50 thereto -between the lower 'wall thereof and chamber adjoining the u pper portion of the saw, a ydischarge chute lnclining upwardly and outwardly from the bottom of the chamber, a condenser chute leading from a. point adjacentl to the lower-portion of the saw,

an air inlet chamber arranged intermediate the two chutes, and a dividing block interposedbetween the two chutes and forming in connection therewith air-blast passages, with one of said passages directed into the mouth of the discharge chute at the bottom of the dust chamber, and the other of said passages directed into the mouth of the condenser chute and against the lower portion ofthe saw.

12. In a-cotton gin, a gin saw, a dust chamber adjoining the upper portion of thev saw, a dischargeA chute leadmg from the 'lower portion of the chamber, a condenser chute leading from apoint adjoining the -lower portion of the saw below the dust chamber, and air-blast passages, one of Which is 'separated from thek saw and directed into the mouth of the discharge chute at thebottom of the dust chamber, and the loth r into the mouth'l of the condenser chutey saw. o

In testimon whereofI aix my signature, in presence o two witnesses. l

JAMES GiDIoKsoN.

against the adjoining portion of the Witnesses: y ARTHUR L. BRYANT,

j H. E. RooKWELL. 

